@jkbuha, nice upgrade. I'm still waiting on my screen part, so currently not using the XPS 9360.
Hence no updates on my git. I expect it to arrive in the next few days.

Edit: Finally. My XPS 9360 is fixed and operational again. I did look at other laptops in the market before deciding to repair, but no major upgrades since this is already i7-8550u. Only becomes worth looking at a next laptop once 32GB hits 13"/14" inch factor and maybe Ice Lake or beyond CPUs.

Has anyone had a problem with the screen's hinge? It became loose last year and I made Dell fix it (well, the 'technician' replaced the whole screen instead of fixing the hinge) and now the problem has recurred, but now the laptop is out of warranty... sigh...

I did this as well and everything seems to work well except the headphone jack doesn't seem to produce any sound. When I plug in headphones they are detected but no sound comes out. Are you guys experiencing the same or did I mess up somewhere?

Did some further research after I thought a bit about this. 250 is the maximum range of the under/over-volt registers, as they're only 8-bit on the Dell. So unless there's a super-resistant die lattice out there, it's likely that you've just not enabled the registers for overclocking (which in turn should enable undervolting).

Also - and more pertinently, there should be higher GB scores with each step you undervolt, as you are further away from the TDP ceiling. What are the GB differences, say at 0, -125, -250?